Looking for classes? Ksquare Career Institute, Bengaluru →
Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
A
$[Xe]\,4f^75d^16s^2$
B
$[Xe]\,4f^65d^26s^2$
C
$[Xe]\,4f^86d^2$
D
$[Xe]\,4f^95s^1$
Detailed Solution
$_{64}Gd = [_{54}Xe]\,4f^75d^16s^2$ — the half-filled $4f^7$ arrangement gives extra stability.